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Roopesh Ojha - Publications

Affiliations: 
1998 Physics Brandeis University, Waltham, MA, United States 
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61 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2020 Marcotulli L, Paliya V, Ajello M, Kaur A, Marchesi S, Rajagopal M, Hartmann D, Gasparrini D, Ojha R, Madejski G. NuSTAR Perspective on High-redshift MeV Blazars The Astrophysical Journal. 889: 164. DOI: 10.3847/1538-4357/Ab65F5  0.408
2020 Jauncey DL, Koay JY, Bignall H, Macquart J, Pursimo T, Giroletti M, Hovatta T, Kiehlmann S, Rickett B, Readhead A, Max-Moerbeck W, Vedantham H, Reynolds C, Lovell J, Ojha R, et al. Interstellar scintillation, ISS, and intrinsic variability of radio AGN Advances in Space Research. 65: 756-762. DOI: 10.1016/J.Asr.2019.05.003  0.395
2020 Edwards PG, Stevens J, Phillips C, Reynolds C, Kovalev YY, Voitsik P, Sokolovsky K, McCallum J, Quick J, Ojha R. Do RadioAstron detections correlate with flaring states? An initial study of seven southern AGN Advances in Space Research. 65: 739-744. DOI: 10.1016/J.Asr.2019.04.010  0.456
2019 Venters TM, Walter R, Humensky B, Blumer H, Guiriec S, Ojha R, Pavlidou V, Lien AY, Wadiasingh Z, Petropoulou M, Hewitt JW, Finke J, Prescod-Weinstein C, Ajello M, Tomsick JA, et al. Energetic Particles of Cosmic Accelerators II: Active Galactic Nuclei and Gamma-ray Bursts Bulletin of the American Astronomical Society. 51: 485. DOI: 10.13016/M2Nyy6-Srpr  0.431
2019 Rani B, Zhang H, Hunter SD, Kislat F, Böttcher M, McEnery JE, Thompson DJ, Giannios D, Guo F, Li H, Baring M, Agudo I, Buson S, Petropoulou M, Pavlidou V, ... ... Ojha R, et al. High-Energy Polarimetry - a new window to probe extreme physics in AGN jets Bulletin of the American Astronomical Society. 51: 348. DOI: 10.13016/M27Jdd-Xxdx  0.371
2018 Abeysekara AU, Archer A, Benbow W, Bird R, Brose R, Buchovecky M, Buckley JH, Bugaev V, Chromey AJ, Connolly MP, Cui W, Daniel MK, Falcone AD, Feng Q, Finley JP, ... ... Ojha R, et al. VERITAS and Fermi-LAT Observations of TeV Gamma-Ray Sources Discovered by HAWC in the 2HWC Catalog The Astrophysical Journal. 866: 24. DOI: 10.3847/1538-4357/Aade4E  0.577
2018 Ackermann M, Atwood WB, Baldini L, Ballet J, Barbiellini G, Bastieri D, Bellazzini R, Berenji B, Bissaldi E, Blandford RD, Bloom ED, Bonino R, Bottacini E, Bregeon J, Bruel P, ... ... Ojha R, et al. Search for Gamma-Ray Emission from Local Primordial Black Holes with theFermiLarge Area Telescope The Astrophysical Journal. 857: 49. DOI: 10.3847/1538-4357/Aaac7B  0.588
2018 Fukazawa Y, Shiki K, Tanaka Y, Itoh R, Takahashi H, Imazato F, D’Ammando F, Ojha R, Nagai aH. X-Ray and GeV Gamma-Ray Variability of the Radio Galaxy NGC 1275 The Astrophysical Journal. 855: 93. DOI: 10.3847/1538-4357/Aaabc0  0.424
2018 Ojha R, Zyl Pv. Fermi LAT detection of renewed strong GeV activity from the FSRQ 3C 279 The Astronomer's Telegram. 11542: 1. DOI: 10.13016/M2Swso-Ecic  0.319
2018 Koay JY, Macquart JP, Jauncey DL, Pursimo T, Giroletti M, Bignall HE, Lovell JEJ, Rickett BJ, Kedziora-Chudczer L, Ojha R, Reynolds C. The MASIV Survey - IV. Relationship between intra-day scintillation and intrinsic variability of radio AGNs Monthly Notices of the Royal Astronomical Society. 474: 4396-4411. DOI: 10.1093/Mnras/Stx3076  0.499
2018 Beuchert T, Rodríguez-Ardila A, Moss VA, Schulz R, Kadler M, Wilms J, Angioni R, Callingham JR, Gräfe C, Krauß F, Kreikenbohm A, Langejahn M, Leiter K, Maccagni FM, Müller C, ... Ojha R, et al. Extended X-ray emission in PKS 1718-649 Astronomy and Astrophysics. 612: 1-5. DOI: 10.1051/0004-6361/201833064  0.579
2018 Ahnen ML, Ansoldi S, Antonelli LA, Arcaro C, Baack D, Babić A, Banerjee B, Bangale P, Almeida UBd, Barrio JA, Bednarek W, Bernardini E, Berse RC, Berti A, Bhattacharyya W, ... ... Ojha R, et al. Detection of the blazar S4 0954+65 at very-high-energy with the MAGIC telescopes during an exceptionally high optical state Astronomy and Astrophysics. 617: 1-15. DOI: 10.1051/0004-6361/201832624  0.586
2018 Krauß F, Kreter M, Müller C, Markowitz A, Böck M, Burnett T, Dauser T, Kadler M, Kreikenbohm A, Ojha R, Wilms J. Investigating source confusion in PMN J1603–4904 Astronomy & Astrophysics. 610: L8. DOI: 10.1051/0004-6361/201732338  0.639
2018 Müller C, Kadler M, Ojha R, Schulz R, Trüstedt J, Edwards PG, Ros E, Carpenter B, Angioni R, Blanchard J, Böck M, Burd PR, Dörr M, Dutka MS, Eberl T, et al. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry. II. Additional sources Astronomy and Astrophysics. 610. DOI: 10.1051/0004-6361/201731455  0.828
2017 Ackermann M, Ajello M, Baldini L, Ballet J, Barbiellini G, Bastieri D, Gonzalez JB, Bellazzini R, Bissaldi E, Blandford RD, Bloom ED, Bonino R, Bottacini E, Bregeon J, Bruel P, ... ... Ojha R, et al. Gamma-Ray Blazars within the First 2 Billion Years The Astrophysical Journal. 837: L5. DOI: 10.3847/2041-8213/Aa5Fff  0.578
2017 Dutka MS, Carpenter BD, Ojha R, Finke JD, D’Ammando F, Kadler M, Edwards PG, Stevens J, Torresi E, Grandi P, Nesci R, Krauß F, Müller C, Wilms J, Gehrels N. Multiband Observations of the Quasar PKS 2326–502 during Active and Quiescent Gamma-Ray States in 2010–2012 The Astrophysical Journal. 835: 182. DOI: 10.3847/1538-4357/835/2/182  0.313
2017 Edwards PG, Kovalev YY, Ojha R, An H, Bignall H, Carpenter B, Hovatta T, Stevens J, Voytsik P, Andrianov AS, Dutka M, Hase H, Horiuchi S, Jauncey DL, Kadler M, et al. PKS 1954–388: RadioAstron detection on 80,000 km baselines and multiwavelength observations Publications of the Astronomical Society of Australia. 34: 10. DOI: 10.1017/Pasa.2017.16  0.701
2016 Fürst F, Müller C, Madsen KK, Lanz L, Rivers E, Brightman M, Arevalo P, Baloković M, Beuchert T, Boggs SE, Christensen FE, Craig WW, Dauser T, Farrah D, Graefe C, ... ... Ojha R, et al. NuSTAR and XMM-NEWTON OBSERVATIONS of the HARD X-RAY SPECTRUM of CENTAURUS A Astrophysical Journal. 819. DOI: 10.3847/0004-637X/819/2/150  0.61
2016 Carpenter B, Ojha R. Fermi-LAT Detection of an Unusual Hard Spectrum and Enhanced Gamma-ray Emission from the FSRQ PKS B1035-281 The Astronomer's Telegram. 8740: 1. DOI: 10.13016/M2Fzks-Ufxm  0.794
2016 Carpenter B, Ojha R. Swift Follow-up of the recent Gamma-ray flare of the FSRQ B2 0748+33 The Astronomer's Telegram. 9752: 1. DOI: 10.13016/M2Cobe-Cujc  0.771
2016 Tanaka YT, Gonzalez JB, Itoh R, Finke JD, Inoue Y, Ojha R, Carpenter B, Lindfors E, Krauß F, Desiante R, Shiki K, Fukazawa Y, Longo F, McEnery JE, Buson S, et al. A significant hardening and rising shape detected in the MeV/GeV νFν spectrum from the recently discovered very-high-energy blazar S4 0954+65 during the bright optical flare in 2015 February Publications of the Astronomical Society of Japan. 68: 51. DOI: 10.1093/Pasj/Psw049  0.81
2016 Spingola C, Dallacasa D, Orienti M, Giroletti M, McKean JP, Cheung CC, Hovatta T, Ciprini S, D'Ammando F, Falco E, Larsson S, Max-Moerbeck W, Ojha R, Readhead ACS, Richards JL, et al. Radio follow-up of the γ-ray flaring gravitational lens JVAS B0218+357 Monthly Notices of the Royal Astronomical Society. 457: 2263-2271. DOI: 10.1093/Mnras/Stw136  0.573
2016 Müller C, Burd P, Schulz R, Coppejans R, Falcke H, Intema H, Kadler M, Krauß F, Ojha R. The MHz-peaked radio spectrum of the unusual γ-ray source PMN J1603–4904 Astronomy and Astrophysics. 593: 1-4. DOI: 10.1051/0004-6361/201629547  0.584
2016 Krauß F, Wilms J, Kadler M, Ojha R, Schulz R, Trüstedt J, Edwards PG, Stevens J, Ros E, Baumgartner W, Beuchert T, Blanchard J, Buson S, Carpenter B, Dauser T, et al. The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars Astronomy and Astrophysics. 591. DOI: 10.1051/0004-6361/201628595  0.797
2016 Kreikenbohm A, Schulz R, Kadler M, Wilms J, Markowitz A, Chang CS, Carpenter B, Elsässer D, Gehrels N, Mannheim K, Müller C, Ojha R, Ros E, Trüstedt J. The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004 - 447: I. the X-ray View Astronomy and Astrophysics. 585. DOI: 10.1051/0004-6361/201424818  0.828
2016 Böck M, Kadler M, Müller C, Tosti G, Ojha R, Wilms J, Bastieri D, Burnett T, Carpenter B, Cavazzuti E, Dutka M, Blanchard J, Edwards PG, Hase H, Horiuchi S, et al. Radio and gamma-ray properties of extragalactic jets from the TANAMI sample Astronomy and Astrophysics. 590. DOI: 10.1051/0004-6361/201424773  0.813
2016 Kadler M, Krauß F, Mannheim K, Ojha R, Müller C, Schulz R, Anton G, Baumgartner W, Beuchert T, Buson S, Carpenter B, Eberl T, Edwards PG, Eisenacher Glawion D, Elsässer D, et al. Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event Nature Physics. DOI: 10.1038/Nphys3715  0.812
2015 Ojha R, Carpenter B. Fermi LAT Detection of a Gamma-ray Flare from the FSRQ PMN J1703-6212 The Astronomer's Telegram. 7330: 1. DOI: 10.13016/M2Qsen-Vaau  0.802
2015 Fey AL, Gordon D, Jacobs CS, Ma C, Gaume RA, Arias EF, Bianco G, Boboltz DA, Böckmann S, Bolotin S, Charlot P, Collioud A, Engelhardt G, Gipson J, Gontier AM, ... ... Ojha R, et al. The second realization of the international celestial reference frame by very long baseline interferometry Astronomical Journal. 150. DOI: 10.1088/0004-6256/150/2/58  0.391
2015 Müller C, Krauß F, Dauser T, Kreikenbohm A, Beuchert T, Kadler M, Ojha R, Wilms J, Böck M, Carpenter B, Dutka M, Markowitz A, McConville W, Pottschmidt K, Stawarz, et al. Redshifted Fe K α line from the unusual γ-ray source PMN J1603-4904 Astronomy and Astrophysics. 574. DOI: 10.1051/0004-6361/201425442  0.75
2015 Klügel T, Höppner K, Falk R, Kühmstedt E, Plötz C, Reinhold A, Rülke A, Wojdziak R, Balss U, Diedrich E, Eineder M, Henniger H, Metzig R, Steigenberger P, Gisinger C, ... ... Ojha R, et al. Earth and space observation at the German Antarctic Receiving Station O’Higgins Polar Record. 51: 590-610. DOI: 10.1017/S0032247414000540  0.344
2015 Kadler M, Ojha R. TANAMI: Multiwavelength and multimessenger observations of active galaxies Astronomische Nachrichten. 336: 499-504. DOI: 10.1002/Asna.201512186  0.588
2014 Edwards PG, Stevens J, Ojha R. ATCA Observations of the New Gamma-ray Source PKS 1824-582 The Astronomer's Telegram. 6076: 1. DOI: 10.13016/M2V1Oe-Bned  0.558
2014 Cutini S, Ciprini S, Orienti M, Tramacere A, D'Ammando F, Verrecchia F, Polenta G, Carrasco L, D'Elia V, Giommi P, González-Nuevo J, Grandi P, Harrison D, Hays E, Larsson S, ... ... Ojha R, et al. Radio-gamma-ray connection and spectral evolution in 4c +49.22 (S4 1150+49): The fermi, swift and planck view Monthly Notices of the Royal Astronomical Society. 445: 4316-4334. DOI: 10.1093/Mnras/Stu2011  0.365
2014 Cheung CC, Larsson S, Scargle JD, Amin MA, Blandford RD, Bulmash D, Chiang J, Ciprini S, Corbet RHD, Falco EE, Marshall PJ, Wood DL, Ajello M, Bastieri D, Chekhtman A, ... ... Ojha R, et al. Fermi large area telescope detection of gravitational lens delayed γ-ray flares from blazar B0218+357 Astrophysical Journal Letters. 782. DOI: 10.1088/2041-8205/782/2/L14  0.538
2014 Krauß F, Kadler M, Mannheim K, Schulz R, Trüstedt J, Wilms J, Ojha R, Ros E, Anton G, Baumgartner W, Beuchert T, Blanchard J, Bürkel C, Carpenter B, Eberl T, et al. TANAMI blazars in the IceCube PeV-neutrino fields Astronomy and Astrophysics. 566. DOI: 10.1051/0004-6361/201424219  0.797
2014 Müller C, Kadler M, Ojha R, Perucho M, Großberger C, Ros E, Wilms J, Blanchard J, Böck M, Carpenter B, Dutka M, Edwards PG, Hase H, Horiuchi S, Kreikenbohm A, et al. TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet Astronomy and Astrophysics. 569. DOI: 10.1051/0004-6361/201423948  0.77
2014 Buson S, Longo F, Larsson S, Cutini S, Finke J, Ciprini S, Ojha R, D'Ammando F, Donato D, Thompson DJ, Desiante R, Bastieri D, Wagner S, Hauser M, Fuhrmann L, et al. Unusual flaring activity in the blazar PKS 1424-418 during 2008-2011 Astronomy and Astrophysics. 569. DOI: 10.1051/0004-6361/201423367  0.817
2014 Müller C, Kadler M, Ojha R, Böck M, Krauß F, Taylor GB, Wilms J, Blanchard J, Carpenter B, Dauser T, Dutka M, Edwards PG, Gehrels N, Großberger C, Hase H, et al. The unusual multiwavelength properties of the gamma-ray source PMN J1603-4904 Astronomy and Astrophysics. 562. DOI: 10.1051/0004-6361/201322827  0.81
2013 Ojha R. Parsec-scale structure of quasars: dawn of the golden age? Bulletin of the Astronomical Society of India. 41: 117. DOI: 10.13016/M2Rjmq-Gwem  0.345
2013 Tamburri S, Hendricks B, Smailagic M, Laur J, Pursimo T, Ojha R. Optical Activity of the Flaring Gamma-ray Blazar TXS 1100+122 The Astronomer's Telegram. 5221: 1. DOI: 10.13016/M2Datr-Ehkx  0.462
2013 Ojha R, Carpenter B, Dutka M. Fermi LAT detection of a gamma-ray flare from FSRQ S5 1044+71 The Astronomer's Telegram. 4941: 1. DOI: 10.13016/M21Hzf-G0Po  0.774
2013 Mayer M, Buehler R, Hays E, Cheung CC, Dutka MS, Grove JE, Kerr M, Ojha R. Rapid Gamma-Ray Flux Variability during the 2013 March Crab Nebula Flare The Astrophysical Journal. 775. DOI: 10.1088/2041-8205/775/2/L37  0.548
2013 Dutka MS, Ojha R, Pottschmidt K, Finke JD, Stevens J, Edwards PG, Blanchard J, Lovell JEJ, Nesci R, Kadler M, Wilms J, Tosti G, Pursimo T, Krauss F, Müller C, et al. Multi-Wavelength Observations of PKS 2142-75 during active and quiescent gamma-ray states Astrophysical Journal. 779. DOI: 10.1088/0004-637X/779/2/174  0.443
2013 Pursimo T, Ojha R, Jauncey DL, Rickett BJ, Dutka MS, Koay JY, Lovell JEJ, Bignall HE, Kedziora-Chudczer L, MacQuart JP. The micro-arcsecond scintillation-induced variability (masiv) survey. III. optical identifications and new redshifts Astrophysical Journal. 767. DOI: 10.1088/0004-637X/767/1/14  0.49
2013 Kreikenbohm A, Kadler M, Wilms J, Schulz R, Müller C, Ojha R, Ros E, Mannheim K, Elsässer D. X-ray monitoring of the radio and γ -ray loud Narrow-Line Seyfert 1 Galaxy PKS2004-447 Epj Web of Conferences. 61. DOI: 10.1051/Epjconf/20136104017  0.605
2013 Nesci R, Tosti G, Pursimo T, Ojha R, Kadler M. Near-infrared and gamma-ray monitoring of TANAMI gamma-ray bright sources Astronomy and Astrophysics. 555. DOI: 10.1051/0004-6361/201321094  0.617
2012 D'Ammando F, Rau A, Schady P, Finke J, Orienti M, Greiner J, Kann DA, Ojha R, Foley AR, Stevens J, Blanchard JM, Edwards PG, Kadler M, Lovell JEJ. PKS 2123-463: A confirmed γ-ray blazar at high redshift Monthly Notices of the Royal Astronomical Society. 427: 893-900. DOI: 10.1111/J.1365-2966.2012.22041.X  0.643
2012 Koay JY, MacQuart JP, Rickett BJ, Bignall HE, Jauncey DL, Pursimo T, Reynolds C, Lovell JEJ, Kedziora-Chudczer L, Ojha R. Why do compact active galactic nuclei at high redshift scintillate less? Astrophysical Journal. 756. DOI: 10.1088/0004-637X/756/1/29  0.495
2012 Blanchard JM, Lovell JEJ, Ojha R, Kadler M, Dickey JM, Edwards PG. High resolution rapid response observations of compact radio sources with the Ceduna Hobart Interferometer (CHI) Astronomy and Astrophysics. 538. DOI: 10.1051/0004-6361/201117593  0.699
2011 Hungwe F, Ojha R, Booth RS, Bietenholz MF, Collioud A, Charlot P, Boboltz D, Fey AL. Characterization of long baseline calibrators at 2.3 GHz Monthly Notices of the Royal Astronomical Society. 418: 2113-2120. DOI: 10.1111/J.1365-2966.2011.19232.X  0.467
2011 Jenkins LP, Brandt WN, Colbert EJM, Koribalski B, Kuntz KD, Levan AJ, Ojha R, Roberts TP, Ward MJ, Zezas A. Investigating the nuclear activity of barred spiral galaxies: The case of NGC1672 Astrophysical Journal. 734. DOI: 10.1088/0004-637X/734/1/33  0.581
2011 Koay JY, MacQuart JP, Rickett BJ, Bignall HE, Lovell JEJ, Reynolds C, Jauncey DL, Pursimo T, Kedziora-Chudczer L, Ojha R. Dual-frequency observations of 140 compact, flat-spectrum active galactic nuclei for scintillation-induced variability Astronomical Journal. 142. DOI: 10.1088/0004-6256/142/4/108  0.512
2011 Müller C, Kadler M, Ojha R, Wilms J, Böck M, Edwards PG, Fromm CM, Hase H, Horiuchi S, Katz U, Lovell JEJ, Plötz C, Pursimo T, Richers S, Ros E, et al. Dual-frequency VLBI study of Centaurus A on sub-parsec scales: The highest-resolution view of an extragalactic jet Astronomy and Astrophysics. 530. DOI: 10.1051/0004-6361/201116605  0.485
2010 Müller C, Kadler M, Ojha R, Böck M, Booth R, Dutka MS, Edwards P, Fey AL, Fuhrmann L, Hase H, Horiuchi S, Jauncey DL, Johnston KJ, Katz U, Lister M, et al. The TANAMI Program Arxiv: Cosmology and Nongalactic Astrophysics. 1248: 481-482. DOI: 10.1063/1.3475502  0.429
2010 Ojha R, Kadler M, Bock M, Booth R, Dutka MS, Edwards PG, Fey AL, Fuhrmann L, Gaume RA, Hase H, Horiuchi S, Jauncey DL, Johnston KJ, Katz U, Lister M, et al. TANAMI: tracking active galactic nuclei with austral milliarcsecond interferometry . I. First-epoch 8.4 GHz images Astronomy and Astrophysics. 519. DOI: 10.1051/0004-6361/200912724  0.475
2009 Wehrle AE, Zacharias N, Johnston K, Boboltz D, Fey AL, Gaume R, Ojha R, Meier DL, Murphy DW, Jones DL, Unwin SC, Piner BG. What is the Structure of Relativistic Jets in AGN on Scales of Light Days Astrophysics. 2010: 310. DOI: 10.13016/M2Lhq8-Mjsh  0.419
2009 Osten RA, Phan-Bao N, Hawley SL, Reid IN, Ojha R. Steady and transient radio emission from ultracool dwarfs Astrophysical Journal. 700: 1750-1758. DOI: 10.1088/0004-637X/700/2/1750  0.486
2008 Lovell JEJ, Rickett BJ, Macquart JP, Jauncey DL, Bignall HE, Kedziora-Chudczer L, Ojha R, Pursimo T, Dutka M, Senkbeil C, Shabala S. The Micro-Arcsecond Scintillation-Induced Variability (MASIV) survey II. the first four epochs Astrophysical Journal. 689: 108-126. DOI: 10.1086/592485  0.445
2008 Lazio TJW, Ojha R, Fey AL, Kedziora‐Chudczer L, Cordes JM, Jauncey DL, Lovell JEJ. Angular Broadening of Intraday Variable AGNs. II. Interstellar and Intergalactic Scattering The Astrophysical Journal. 672: 115-121. DOI: 10.1086/520572  0.423
2007 Jauncey D, Lovell J, Senkbeil C, Shabala S, Bignall H, Pursimo T, Ojha R, Dutka M, Macquart J, Rickett BJ, Kedziora-Chudczer L. Microarcsecond scintillation-induced variability (MASIV) survey of the northern sky Astronomical & Astrophysical Transactions. 26: 575-583. DOI: 10.1080/10556790701596846  0.403
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